/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

(function (mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function (CodeMirror) {
  "use strict";

  var htmlConfig = {
    autoSelfClosers: {
      'area': true, 'base': true, 'br': true, 'col': true, 'command': true,
      'embed': true, 'frame': true, 'hr': true, 'img': true, 'input': true,
      'keygen': true, 'link': true, 'meta': true, 'param': true, 'source': true,
      'track': true, 'wbr': true, 'menuitem': true
    },
    implicitlyClosed: {
      'dd': true, 'li': true, 'optgroup': true, 'option': true, 'p': true,
      'rp': true, 'rt': true, 'tbody': true, 'td': true, 'tfoot': true,
      'th': true, 'tr': true
    },
    contextGrabbers: {
      'dd': {'dd': true, 'dt': true},
      'dt': {'dd': true, 'dt': true},
      'li': {'li': true},
      'option': {'option': true, 'optgroup': true},
      'optgroup': {'optgroup': true},
      'p': {
        'address': true, 'article': true, 'aside': true, 'blockquote': true, 'dir': true,
        'div': true, 'dl': true, 'fieldset': true, 'footer': true, 'form': true,
        'h1': true, 'h2': true, 'h3': true, 'h4': true, 'h5': true, 'h6': true,
        'header': true, 'hgroup': true, 'hr': true, 'menu': true, 'nav': true, 'ol': true,
        'p': true, 'pre': true, 'section': true, 'table': true, 'ul': true
      },
      'rp': {'rp': true, 'rt': true},
      'rt': {'rp': true, 'rt': true},
      'tbody': {'tbody': true, 'tfoot': true},
      'td': {'td': true, 'th': true},
      'tfoot': {'tbody': true},
      'th': {'td': true, 'th': true},
      'thead': {'tbody': true, 'tfoot': true},
      'tr': {'tr': true}
    },
    doNotIndent: {"pre": true},
    allowUnquoted: true,
    allowMissing: true,
    caseFold: true
  }

  var xmlConfig = {
    autoSelfClosers: {},
    implicitlyClosed: {},
    contextGrabbers: {},
    doNotIndent: {},
    allowUnquoted: false,
    allowMissing: false,
    caseFold: false
  }

  CodeMirror.defineMode("xml", function (editorConf, config_) {
    var indentUnit = editorConf.indentUnit
    var config = {}
    var defaults = config_.htmlMode ? htmlConfig : xmlConfig
    for (var prop in defaults) config[prop] = defaults[prop]
    for (var prop in config_) config[prop] = config_[prop]

    // Return variables for tokenizers
    var type, setStyle;

    function inText(stream, state) {
      function chain(parser) {
        state.tokenize = parser;
        return parser(stream, state);
      }

      var ch = stream.next();
      if (ch == "<") {
        if (stream.eat("!")) {
          if (stream.eat("[")) {
            if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>"));
            else return null;
          } else if (stream.match("--")) {
            return chain(inBlock("comment", "-->"));
          } else if (stream.match("DOCTYPE", true, true)) {
            stream.eatWhile(/[\w\._\-]/);
            return chain(doctype(1));
          } else {
            return null;
          }
        } else if (stream.eat("?")) {
          stream.eatWhile(/[\w\._\-]/);
          state.tokenize = inBlock("meta", "?>");
          return "meta";
        } else {
          type = stream.eat("/") ? "closeTag" : "openTag";
          state.tokenize = inTag;
          return "tag bracket";
        }
      } else if (ch == "&") {
        var ok;
        if (stream.eat("#")) {
          if (stream.eat("x")) {
            ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";");
          } else {
            ok = stream.eatWhile(/[\d]/) && stream.eat(";");
          }
        } else {
          ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";");
        }
        return ok ? "atom" : "error";
      } else {
        stream.eatWhile(/[^&<]/);
        return null;
      }
    }

    inText.isInText = true;

    function inTag(stream, state) {
      var ch = stream.next();
      if (ch == ">" || (ch == "/" && stream.eat(">"))) {
        state.tokenize = inText;
        type = ch == ">" ? "endTag" : "selfcloseTag";
        return "tag bracket";
      } else if (ch == "=") {
        type = "equals";
        return null;
      } else if (ch == "<") {
        state.tokenize = inText;
        state.state = baseState;
        state.tagName = state.tagStart = null;
        var next = state.tokenize(stream, state);
        return next ? next + " tag error" : "tag error";
      } else if (/[\'\"]/.test(ch)) {
        state.tokenize = inAttribute(ch);
        state.stringStartCol = stream.column();
        return state.tokenize(stream, state);
      } else {
        stream.match(/^[^\s\u00a0=<>\"\']*[^\s\u00a0=<>\"\'\/]/);
        return "word";
      }
    }

    function inAttribute(quote) {
      var closure = function (stream, state) {
        while (!stream.eol()) {
          if (stream.next() == quote) {
            state.tokenize = inTag;
            break;
          }
        }
        return "string";
      };
      closure.isInAttribute = true;
      return closure;
    }

    function inBlock(style, terminator) {
      return function (stream, state) {
        while (!stream.eol()) {
          if (stream.match(terminator)) {
            state.tokenize = inText;
            break;
          }
          stream.next();
        }
        return style;
      };
    }

    function doctype(depth) {
      return function (stream, state) {
        var ch;
        while ((ch = stream.next()) != null) {
          if (ch == "<") {
            state.tokenize = doctype(depth + 1);
            return state.tokenize(stream, state);
          } else if (ch == ">") {
            if (depth == 1) {
              state.tokenize = inText;
              break;
            } else {
              state.tokenize = doctype(depth - 1);
              return state.tokenize(stream, state);
            }
          }
        }
        return "meta";
      };
    }

    function Context(state, tagName, startOfLine) {
      this.prev = state.context;
      this.tagName = tagName;
      this.indent = state.indented;
      this.startOfLine = startOfLine;
      if (config.doNotIndent.hasOwnProperty(tagName) || (state.context && state.context.noIndent))
        this.noIndent = true;
    }

    function popContext(state) {
      if (state.context) state.context = state.context.prev;
    }

    function maybePopContext(state, nextTagName) {
      var parentTagName;
      while (true) {
        if (!state.context) {
          return;
        }
        parentTagName = state.context.tagName;
        if (!config.contextGrabbers.hasOwnProperty(parentTagName) ||
          !config.contextGrabbers[parentTagName].hasOwnProperty(nextTagName)) {
          return;
        }
        popContext(state);
      }
    }

    function baseState(type, stream, state) {
      if (type == "openTag") {
        state.tagStart = stream.column();
        return tagNameState;
      } else if (type == "closeTag") {
        return closeTagNameState;
      } else {
        return baseState;
      }
    }

    function tagNameState(type, stream, state) {
      if (type == "word") {
        state.tagName = stream.current();
        setStyle = "tag";
        return attrState;
      } else {
        setStyle = "error";
        return tagNameState;
      }
    }

    function closeTagNameState(type, stream, state) {
      if (type == "word") {
        var tagName = stream.current();
        if (state.context && state.context.tagName != tagName &&
          config.implicitlyClosed.hasOwnProperty(state.context.tagName))
          popContext(state);
        if ((state.context && state.context.tagName == tagName) || config.matchClosing === false) {
          setStyle = "tag";
          return closeState;
        } else {
          setStyle = "tag error";
          return closeStateErr;
        }
      } else {
        setStyle = "error";
        return closeStateErr;
      }
    }

    function closeState(type, _stream, state) {
      if (type != "endTag") {
        setStyle = "error";
        return closeState;
      }
      popContext(state);
      return baseState;
    }

    function closeStateErr(type, stream, state) {
      setStyle = "error";
      return closeState(type, stream, state);
    }

    function attrState(type, _stream, state) {
      if (type == "word") {
        setStyle = "attribute";
        return attrEqState;
      } else if (type == "endTag" || type == "selfcloseTag") {
        var tagName = state.tagName, tagStart = state.tagStart;
        state.tagName = state.tagStart = null;
        if (type == "selfcloseTag" ||
          config.autoSelfClosers.hasOwnProperty(tagName)) {
          maybePopContext(state, tagName);
        } else {
          maybePopContext(state, tagName);
          state.context = new Context(state, tagName, tagStart == state.indented);
        }
        return baseState;
      }
      setStyle = "error";
      return attrState;
    }

    function attrEqState(type, stream, state) {
      if (type == "equals") return attrValueState;
      if (!config.allowMissing) setStyle = "error";
      return attrState(type, stream, state);
    }

    function attrValueState(type, stream, state) {
      if (type == "string") return attrContinuedState;
      if (type == "word" && config.allowUnquoted) {
        setStyle = "string";
        return attrState;
      }
      setStyle = "error";
      return attrState(type, stream, state);
    }

    function attrContinuedState(type, stream, state) {
      if (type == "string") return attrContinuedState;
      return attrState(type, stream, state);
    }

    return {
      startState: function (baseIndent) {
        var state = {
          tokenize: inText,
          state: baseState,
          indented: baseIndent || 0,
          tagName: null, tagStart: null,
          context: null
        }
        if (baseIndent != null) state.baseIndent = baseIndent
        return state
      },

      token: function (stream, state) {
        if (!state.tagName && stream.sol())
          state.indented = stream.indentation();

        if (stream.eatSpace()) return null;
        type = null;
        var style = state.tokenize(stream, state);
        if ((style || type) && style != "comment") {
          setStyle = null;
          state.state = state.state(type || style, stream, state);
          if (setStyle)
            style = setStyle == "error" ? style + " error" : setStyle;
        }
        return style;
      },

      indent: function (state, textAfter, fullLine) {
        var context = state.context;
        // Indent multi-line strings (e.g. css).
        if (state.tokenize.isInAttribute) {
          if (state.tagStart == state.indented)
            return state.stringStartCol + 1;
          else
            return state.indented + indentUnit;
        }
        if (context && context.noIndent) return CodeMirror.Pass;
        if (state.tokenize != inTag && state.tokenize != inText)
          return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0;
        // Indent the starts of attribute names.
        if (state.tagName) {
          if (config.multilineTagIndentPastTag !== false)
            return state.tagStart + state.tagName.length + 2;
          else
            return state.tagStart + indentUnit * (config.multilineTagIndentFactor || 1);
        }
        if (config.alignCDATA && /<!\[CDATA\[/.test(textAfter)) return 0;
        var tagAfter = textAfter && /^<(\/)?([\w_:\.-]*)/.exec(textAfter);
        if (tagAfter && tagAfter[1]) { // Closing tag spotted
          while (context) {
            if (context.tagName == tagAfter[2]) {
              context = context.prev;
              break;
            } else if (config.implicitlyClosed.hasOwnProperty(context.tagName)) {
              context = context.prev;
            } else {
              break;
            }
          }
        } else if (tagAfter) { // Opening tag spotted
          while (context) {
            var grabbers = config.contextGrabbers[context.tagName];
            if (grabbers && grabbers.hasOwnProperty(tagAfter[2]))
              context = context.prev;
            else
              break;
          }
        }
        while (context && context.prev && !context.startOfLine)
          context = context.prev;
        if (context) return context.indent + indentUnit;
        else return state.baseIndent || 0;
      },

      electricInput: /<\/[\s\w:]+>$/,
      blockCommentStart: "<!--",
      blockCommentEnd: "-->",

      configuration: config.htmlMode ? "html" : "xml",
      helperType: config.htmlMode ? "html" : "xml",

      skipAttribute: function (state) {
        if (state.state == attrValueState)
          state.state = attrState
      }
    };
  });

  CodeMirror.defineMIME("text/xml", "xml");
  CodeMirror.defineMIME("application/xml", "xml");
  if (!CodeMirror.mimeModes.hasOwnProperty("text/html"))
    CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});

});
